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<title>菜鸟教程(runoob.com)</title> 
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<script>
function changeImage()
{
	element=document.getElementById('myimage')
	if (element.src.match("bulbon"))
	{
		element.src="../Images/pic_bulboff.gif";
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	else
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		element.src="../Images/pic_bulbon.gif";
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<img id="myimage" onclick="changeImage()" src="../Images/pic_bulboff.gif" width="100" height="180">
<p>点击灯泡就可以打开或关闭这盏灯</p>
	
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